When defenses like these succeed, they are copycatted. If Ethan Couch can argue that he is the victim of bad parenting, why can't the murderer who was abused by his parents avoid jail time or even conviction ?

If there can be a Twinkie defense, why can't there be one for Zoloft? That appears to be the logic of the defense in the case of Anthony Nicholas Orban, the Westminster, Calif., police detective charged with kidnapping and raping a waitress at gunpoint in 2010.

My client George Zimmerman is a very vulnerable individual weighing only 250 pounds. Fragile and delicate like a petite, gamine ballet dancer. His assailant Trayvon Martin was over 100 pounds lighter -- making him much more agile and dangerous.